MBP w/ 7200 rpm HD shipping delay?

I will be ordering my first Mac (A low end MPB) and have decided to spring for the 160 gig HD @ 7200 but saw that it changed the shipping date to 4 to 6 weeks. Is there just a flood of orders for the 7200 rpm HD model or maybe back order on that particular hard drive? Does anyone know what's going on?

I don't think it's a flood of orders because it was like that in the very first moments of the website being updated. I think they just have to wait for shipments of the drives because that drive was just released.

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